About to aquire a Gemini I

[Hangman]

I think doing the filter caps is important. I don't think that beefing up the values is needed in the gemini 1. That being said, i have a g12 and I upped the value to 100uf I think.... though I may have done 64uf. (dual 32uf in parallel) I'll have to check when I get home. I upped other values from 40uf to 50uf and from 20uf to 32uf but that was more an issue of multi can capacitors. I only use F&T, don't trust the JJ caps,and don't trust the CE caps, so F&T makes them in Dual 50 and dual 32. those were the options i had. If F&T made exact replacements in that form, I would've used them.

I definitely don't think 50W resistor is necessary for the screen supply. thats a lot of unnecessary heat/power dissipation for what amounts to a pretty minor change in voltage. The 7591s can take it, why bother?

the 470 ohm resistor for the screen supply on the g12 is fine. honestly its probably fine on the gemini II.

I tend to think of the Gemini I as one of ampegs finest designs, Ive done some experiments with mine and I always end up putting it back to stock. (aside from the minor changes in the filter caps)

Hangman-

I'm going to be acquiring a Gemini I this week. Its been in a basement, long forgotten about for over 20 years. I'm going to rebuild it even before I power it up. I'll hit the power supply and all 'lytics.

While I'm in there I'll swap out all the film caps w/ Mallory 150's, any beatup looking resistors and all resistors in pwr supply and bias. Will pull the tone pack and put discreet components like I did for my Gemini II and VT22.

rewire the 7199 for 6U8A

I do have a question about the pwr spply. The Gemini I is quite similar to my Gemini II and I was thinking of beefing up the pwr sppply like I had done to my Gemini II.

Gemini II Pwr Spply filtering beefed up a bit as follows...
80 uf upped to 110uf (2x 220 in series w/ bleeder resistors)
40 uf's upped to 47uf
20uf's upped to 30uf

changed the 470ohm screen resistor to 1k ohm 5watt

On Richie Johnson's (of NY Repair & Guitar) suggestion I put in a 10k ohm 50watt resistor for the screen voltage... to bleed off the excess voltage and get it down to 430v again.

Is it a good idea to give my Gemini I the same treatment or just do as you had suggested in "that other ampeg site" and find a place to mount an axial 80 uf 450v on the tag board, and then use a 50x50 for the remaining 40 uf sections.

*** Gemini II mods for reference ***